To get lacquer to go over enamel without it affecting the enamel underneath, you have to spray the clear lacquer on in light, mist coats. After two or three light mist coats it will form a barrier that will keep the wet coats from attacking the enamel. Since you said you used spray cans I would imagine that it went on too heavy and attacked the enamel underneath.
The only way to fix it would be to strip the paint and start over.
If you don't have an airbrush to allow for the thin coats needed then I would buy an acrylic clear coat in a can and use that as your gloss coat, or use some Krylon clear which I believe is an enamel.
Be sure and test it on a scrap piece that has been painted with your enamel to make sure they are compatible.
Mike
“Wisdom is the right use of knowledge. To know is not
to be wise. Many men know a great deal, and are all the greater fools
for it. There is no fool so great a fool as a knowing fool. But to know
how to use knowledge is to have wisdom. " Charles Spurgeon